Extract the middle three characters from the 'name' column in the 'users' table.
CREATE TABLE users (id INTEGER, name VARCHAR); INSERT INTO users (id, name) VALUES (1, 'DuckDB'), (2, 'SQLite'), (3, 'PostgreSQL');
```sql
SELECT SUBSTR(name, 2, 3) AS middle_three_chars FROM users;
```
```sql
SELECT SUBSTR(name, 2, 3) AS middle_three_chars FROM users;
```